z/OS Communications Server: SNA Network Implementation Guide
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Comparing host name and IP address definitions

z/OS Communications Server: SNA Network Implementation Guide
SC27-3672-01

To configure EE, the IP addresses on both sides of a connection need to be known; one on the local side, and one on the remote side. EE creates the logical connection between these two addresses. The following rules apply to using a host name instead of an IP address.

Rules:
  • If you use EE across IPv6 networks, you must use host names to define endpoints.
  • If you define EE connection networks, use host name definitions instead of IP addresses.
    • If you are using an EE connection network over an IP network with NAT boundaries, you must use host names.
    • If you are using an EE connection network over an IP network without NAT boundaries, using host names ensures compatibility with future IP addressing schemes.

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